Severe Storms

WW 520 SEVERE TSTM MN WI 192215Z - 200500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 520 NWS Storm Prediction Center Norman OK 515 PM CDT Wed Jul 19 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of South-central Minnesota Western Wisconsin * Effective this Wednesday afternoon from 515 PM until Midnight CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible A tornado or two possible SUMMARY...Increasing thunderstorm coverage over central/southwestern MN, and a favorable environment to the east across the remainder of the watch area (including Twin Cities metro) suggests a severe wind/hail threat will increase for another few hours and persist into late evening. The severe thunderstorm watch area is approximately along and 100 statute miles east and west of a line from 45 miles south southwest of Minneapolis MN to 40 miles north northeast of Minneapolis MN. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 517...WW 518...WW 519... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29020. ...Edwards Read more

WW 0519 Status Updates
STATUS REPORT ON WW 519 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..JEWELL..07/19/23 ATTN...WFO...PUB...GLD...BOU...DDC...ABQ...AMA... STATUS REPORT FOR WS 519 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC009-011-017-025-041-061-063-071-073-089-099-101-125-192240- CO . COLORADO COUNTIES INCLUDED ARE BACA BENT CHEYENNE CROWLEY EL PASO KIOWA KIT CARSON LAS ANIMAS LINCOLN OTERO PROWERS PUEBLO YUMA KSC023-039-063-065-071-075-093-101-109-129-137-153-171-179-181- 187-193-199-203-192240- KS . KANSAS COUNTIES INCLUDED ARE CHEYENNE DECATUR GOVE GRAHAM GREELEY HAMILTON KEARNY LANE LOGAN MORTON NORTON RAWLINS SCOTT SHERIDAN SHERMAN STANTON THOMAS WALLACE WICHITA Read more

WW 519 SEVERE TSTM CO KS NE NM OK TX 192050Z - 200400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 519 NWS Storm Prediction Center Norman OK 250 PM MDT Wed Jul 19 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Colorado Western Kansas Southwest Nebraska Northeast New Mexico Western Oklahoma Panhandle Northwest Texas Panhandle * Effective this Wednesday afternoon and evening from 250 PM until 1000 PM MDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2.5 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Thunderstorms will develop off the mountains of central Colorado, and along a boundary extending northeastward into Kansas. All of these storms will spread southeastward this evening with a risk of damaging wind gusts and large hail. The severe thunderstorm watch area is approximately along and 105 statute miles north and south of a line from 40 miles southwest of La Junta CO to 70 miles south southeast of Mccook NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 517...WW 518... AVIATION...A few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27025. ...Hart Read more

WW 0517 Status Updates
STATUS REPORT ON WW 517 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 S HSE TO 30 ENE EWN TO 30 NE EWN TO 45 NE EWN TO 25 S ECG TO 20 SE ECG TO 30 ENE ECG TO 45 ESE ORF. ..JEWELL..07/19/23 ATTN...WFO...MHX...AKQ... STATUS REPORT FOR WT 517 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NCC013-055-095-177-192240- NC . NORTH CAROLINA COUNTIES INCLUDED ARE BEAUFORT DARE HYDE TYRRELL AMZ131-135-231-ANZ658-192240- CW . ADJACENT COASTAL WATERS INCLUDED ARE ALLIGATOR RIVER PAMLICO SOUND CROATAN AND ROANOKE SOUNDS COASTAL WATERS FROM NC VA BORDER TO CURRITUCK BEACH LIGHT NC OUT 20 NM Read more

WW 517 TORNADO NC VA CW 191705Z - 192300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 517 NWS Storm Prediction Center Norman OK 105 PM EDT Wed Jul 19 2023 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northeast North Carolina Southeast Virginia Coastal Waters * Effective this Wednesday afternoon and evening from 105 PM until 700 PM EDT. * Primary threats include... A couple tornadoes possible Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1 inch in diameter possible SUMMARY...A cluster of thunderstorms over northeast North Carolina will track eastward this afternoon posing a risk of a few tornadoes and damaging wind gusts. The tornado watch area is approximately along and 40 statute miles north and south of a line from 65 miles west of Elizabeth City NC to 45 miles east southeast of Norfolk VA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 25030. ...Hart Read more

WW 0518 Status Updates
STATUS REPORT ON WW 518 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..WENDT..07/19/23 ATTN...WFO...DLH...FGF...MPX... STATUS REPORT FOR WS 518 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MNC001-007-017-021-025-035-059-061-065-071-077-095-115-137- 192240- MN . MINNESOTA COUNTIES INCLUDED ARE AITKIN BELTRAMI CARLTON CASS CHISAGO CROW WING ISANTI ITASCA KANABEC KOOCHICHING LAKE OF THE WOODS MILLE LACS PINE ST. LOUIS WIC005-007-013-031-095-107-113-129-192240- WI . WISCONSIN COUNTIES INCLUDED ARE BARRON BAYFIELD BURNETT DOUGLAS POLK RUSK SAWYER WASHBURN LSZ144-145-192240- CW Read more

WW 518 SEVERE TSTM MN WI LS 192015Z - 200300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 518 NWS Storm Prediction Center Norman OK 315 PM CDT Wed Jul 19 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Minnesota Northwest Wisconsin Lake Superior * Effective this Wednesday afternoon and evening from 315 PM until 1000 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible A tornado or two possible SUMMARY...Thunderstorms are increasing in coverage and intensity over northern Minnesota. These storms will track eastward through the afternoon and early evening, posing a risk of large hail and damaging winds. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 40 miles west northwest of International Falls MN to 95 miles south of Duluth MN. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 517... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27030. ...Hart Read more

MD 1634 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR NORTH-CENTRAL NEBRASKA INTO SOUTHEASTERN SOUTH DAKOTA
Mesoscale Discussion 1634 NWS Storm Prediction Center Norman OK 0356 PM CDT Wed Jul 19 2023 Areas affected...North-central Nebraska into southeastern South Dakota Concerning...Severe potential...Watch possible Valid 192056Z - 192300Z Probability of Watch Issuance...60 percent SUMMARY...The area is being monitored for increasing severe-thunderstorm potential this afternoon. Very large hail and damaging winds are the main concerns. A watch is possible for parts of the area. DISCUSSION...In the wake of widespread morning convection across central Nebraska and southeastern South Dakota, cloud breaks are supporting filtered diurnal heating of a moist air mass (middle/upper 60s dewpoints) along/south of a southward-moving cold front. Clear skies north of the front and the early-day convection/ongoing cloud coverage to the south have weakened the frontal circulation, though a surface wind shift is still evident. During the next couple of hours, isolated to widely scattered thunderstorms may develop in the vicinity of the wind shift and perhaps subtle differential heating boundaries in central NE. Steep midlevel lapse rates atop the destabilizing boundary-layer and a long/straight hodograph (40-50 kt of effective shear) will support supercells capable of producing large to very large hail and locally severe gusts. Thunderstorm coverage is uncertain given lingering inhibition associated with the antecedent outflow, though convective trends are being monitored for a watch for parts of the area. ..Weinman/Hart.. 07/19/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FSD...OAX...ABR...GID...LBF...UNR... LAT...LON 42310154 42020159 41620142 41380109 41140070 41090018 41339961 42129854 42449812 42789751 43039675 43259661 43699652 43869681 43899735 43829799 43639900 43379977 42850084 42510130 42310154 Read more

MD 1632 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR PARTS OF EASTERN NEVADA AND WESTERN UT
Mesoscale Discussion 1632 NWS Storm Prediction Center Norman OK 0321 PM CDT Wed Jul 19 2023 Areas affected...Parts of eastern Nevada and western UT Concerning...Severe potential...Watch unlikely Valid 192021Z - 192245Z Probability of Watch Issuance...20 percent SUMMARY...Thunderstorm coverage will gradually increase through the afternoon. Strong to severe gusts may accompany the stronger storms. A watch is not currently expected. DISCUSSION...A vorticity maximum embedded in a belt of moderate west-southwesterly midlevel flow (evident in water vapor imagery) will continue east-northeastward across eastern Nevada and western UT this afternoon into early evening. As DCVA preceding this feature overspreads a diurnally destabilizing air mass, thunderstorm coverage will gradually increase during the next few hours as boundary-layer inhibition continues to erode. While modest deep-layer shear (20-30 kt of effective shear) may limit convective organization to an extent, at least loosely organized updrafts embedded in larger clusters of eastward-moving storms will be possible. This, combined with the diurnally deepening boundary layer and steepening low-level lapse rates (characterized by inverted-V thermodynamic profiles) will support strong to severe outflow winds -- especially with any loosely organized clusters. ..Weinman/Hart.. 07/19/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...SLC...PIH...VEF...LKN... LAT...LON 41841428 41991358 41991292 41891222 41501168 41011154 40591148 39261186 38641232 38241280 38191335 38191395 38251503 38481545 38661570 39001577 39571572 40011559 40991505 41481472 41841428 Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Wed Jul 19 2023 Valid 192000Z - 201200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL PLAINS INTO THE UPPER MIDWEST...AND EASTERN NORTH CAROLINA INTO SOUTHEASTERN VIRGINIA... ...SUMMARY... Scattered severe thunderstorms capable of producing damaging winds and hail are expected this afternoon into tonight across parts of the Upper Midwest, central Plains, and Mid Atlantic regions. More isolated strong to severe thunderstorms may also occur from the Ozarks into the lower Ohio and Tennessee Valleys, and parts of the Great Basin. ...20Z Update... The Slight Risk has been expanded across parts of eastern NC based on recent convective trends. See Mesoscale Discussion 1628 for more details on the near-term severe threat for this area. Have trimmed the Marginal Risk across parts of the TN and lower OH Valley. There still appears to be some potential for strong to locally severe thunderstorms late tonight into early Thursday morning over portions of this region as convection spreads eastward in a modest low-level warm advection regime ahead of an approaching upper trough. Small adjustments have also been made to the Marginal/Slight Risk areas across the mid MO Valley into eastern SD/western MN based on observational and short-term model trends. ..Gleason.. 07/19/2023 .PREV DISCUSSION... /ISSUED 1121 AM CDT Wed Jul 19 2023/ ...MN/WI... An upper low is tracking southeastward out of southern Manitoba into ND. At the surface, a quasi-stationary boundary extends from northwest MN southward to near MSP. Westerly low-level winds and strong heating west of the boundary, combined with backed flow to the east and more persistent low-level moisture, will lead to an axis of thunderstorm development this afternoon. Forecast soundings show low-level and deep-layer shear profiles favorable for rotating storms capable of hail and gusty winds. A tornado or two is also possible. These storms will drift eastward into the MN Arrowhead region and northern WI during the evening. ...Central Plains... A broad upper ridge is positioned from the Four Corners region eastward across the southeast states today, with the southern fringe of stronger westerlies extending across CO/KS. Rich low-level moisture is present across much of the central Plains, with dewpoints in the upper 60s and 70s from eastern CO into central NE. Thunderstorms are expected to develop along the western edge of the greater moisture by mid-afternoon along an axis from north-central NE into northwest KS and eastern CO. These storms will spread southeastward through the evening, posing a risk of very large hail and damaging winds. Activity is expected to build as far south as parts of the TX/OK Panhandles during the evening. ...KS/MO... Multiple 12z CAM solutions suggest that a cluster of storms over northern KS will grow upscale and become very organized late tonight, resulting in a corridor of severe wind potential from eastern KS across central into southeast MO. At this point, the confidence in this scenario remains low but will be monitored. ...VA/NC... A remnant MCV is evident in satellite/radar imagery over north-central NC. The associated cluster of thunderstorms will track northeastward toward the coast this afternoon, posing a risk of damaging wind gusts. Please refer to MCD #1627 for further details. ...UT... A cluster of showers and thunderstorms over western NV is associated with a weak mid-level shortwave trough. Weak but sufficient forcing ahead of this system will lead to scattered thunderstorm development later today over eastern NV and western UT. Forecast soundings show inverted-v profiles, but with pockets of CAPE around 500-1000 J/kg and with 25-30 knots of westerly mid-level flow. This will be sufficient to pose a risk of locally severe wind gusts in the stronger cells. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Wed Jul 19 2023 Valid 192000Z - 201200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL PLAINS INTO THE UPPER MIDWEST...AND EASTERN NORTH CAROLINA INTO SOUTHEASTERN VIRGINIA... ...SUMMARY... Scattered severe thunderstorms capable of producing damaging winds and hail are expected this afternoon into tonight across parts of the Upper Midwest, central Plains, and Mid Atlantic regions. More isolated strong to severe thunderstorms may also occur from the Ozarks into the lower Ohio and Tennessee Valleys, and parts of the Great Basin. ...20Z Update... The Slight Risk has been expanded across parts of eastern NC based on recent convective trends. See Mesoscale Discussion 1628 for more details on the near-term severe threat for this area. Have trimmed the Marginal Risk across parts of the TN and lower OH Valley. There still appears to be some potential for strong to locally severe thunderstorms late tonight into early Thursday morning over portions of this region as convection spreads eastward in a modest low-level warm advection regime ahead of an approaching upper trough. Small adjustments have also been made to the Marginal/Slight Risk areas across the mid MO Valley into eastern SD/western MN based on observational and short-term model trends. ..Gleason.. 07/19/2023 .PREV DISCUSSION... /ISSUED 1121 AM CDT Wed Jul 19 2023/ ...MN/WI... An upper low is tracking southeastward out of southern Manitoba into ND. At the surface, a quasi-stationary boundary extends from northwest MN southward to near MSP. Westerly low-level winds and strong heating west of the boundary, combined with backed flow to the east and more persistent low-level moisture, will lead to an axis of thunderstorm development this afternoon. Forecast soundings show low-level and deep-layer shear profiles favorable for rotating storms capable of hail and gusty winds. A tornado or two is also possible. These storms will drift eastward into the MN Arrowhead region and northern WI during the evening. ...Central Plains... A broad upper ridge is positioned from the Four Corners region eastward across the southeast states today, with the southern fringe of stronger westerlies extending across CO/KS. Rich low-level moisture is present across much of the central Plains, with dewpoints in the upper 60s and 70s from eastern CO into central NE. Thunderstorms are expected to develop along the western edge of the greater moisture by mid-afternoon along an axis from north-central NE into northwest KS and eastern CO. These storms will spread southeastward through the evening, posing a risk of very large hail and damaging winds. Activity is expected to build as far south as parts of the TX/OK Panhandles during the evening. ...KS/MO... Multiple 12z CAM solutions suggest that a cluster of storms over northern KS will grow upscale and become very organized late tonight, resulting in a corridor of severe wind potential from eastern KS across central into southeast MO. At this point, the confidence in this scenario remains low but will be monitored. ...VA/NC... A remnant MCV is evident in satellite/radar imagery over north-central NC. The associated cluster of thunderstorms will track northeastward toward the coast this afternoon, posing a risk of damaging wind gusts. Please refer to MCD #1627 for further details. ...UT... A cluster of showers and thunderstorms over western NV is associated with a weak mid-level shortwave trough. Weak but sufficient forcing ahead of this system will lead to scattered thunderstorm development later today over eastern NV and western UT. Forecast soundings show inverted-v profiles, but with pockets of CAPE around 500-1000 J/kg and with 25-30 knots of westerly mid-level flow. This will be sufficient to pose a risk of locally severe wind gusts in the stronger cells. Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0225 PM CDT Wed Jul 19 2023 Valid 201200Z - 211200Z ...NO CRITICAL AREAS... No changes, the previous forecast discussion remains valid. ..Lyons.. 07/19/2023 .PREV DISCUSSION... /ISSUED 0200 AM CDT Wed Jul 19 2023/ ...Synopsis... Upper-level ridging will remain the dominant feature across the West on Thursday. This ridge may shift slightly eastward through the period. As this occurs, stronger mid-level winds will move inland in the Northwest late Thursday into Friday. At the surface, the pressure pattern will remain nebulous across the West. However, a surface thermal pressure trough will likely develop into the Columbia Basin. Fire weather concerns will again be minimal across the U.S. on account of weak surface. Hot and dry conditions will continue in the Southwest, Great Basin, and Northwest. Some locally elevated conditions could occur in terrain-favored areas. Flow through the Cascade gaps and Columbia Gorge will likely increase as the trough approaches. The increase in surface winds will not occur during the diurnal RH minimum though. While mid-level moisture is expected to be pushed east, a few thunderstorms are possible from eastern Nevada into western Colorado. Fuels are still not expected to be critically dry and storm coverage will be lower than previous days. Confidence in lightning ignitions remains too low for highlights. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1230 PM CDT Wed Jul 19 2023 Valid 201200Z - 211200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHERN/CENTRAL HIGH PLAINS... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE GREAT LAKES/OHIO VALLEY...AND THE CAROLINAS... ...SUMMARY... Scattered severe thunderstorms should occur Thursday across parts of the central/southern High Plains, Great Lakes/Ohio Valley, and parts of the Carolinas. The greatest concentration of severe wind may occur over parts of southeastern Colorado into southwestern Kansas and the Oklahoma Panhandle. ...Central/Southern High Plains... The western portion of a cold front will likely stall and become draped across eastern CO during the day. Easterly low-level flow will again favor seasonably moist conditions across the central High Plains with thunderstorm development expected by midday into the early afternoon along/near the CO Front Range. Convection should move east of the higher terrain during the early/mid afternoon and gradually intensify. Various model guidance shows elongated hodographs which will be favorable for organized thunderstorms, including supercells early in the convective life cycle. Large hail should be the main severe threat initially. Increasing coverage late Thursday afternoon/evening will likely favor a cluster/MCS to develop and potentially track east-southeastward near the boundary across southeastern CO/southwestern KS and perhaps into the OK/TX Panhandles during the evening, with a wind threat perhaps continuing into the late night near the OK/KS border. Given increased confidence in this MCS scenario occurring, have added greater severe wind probabilities and an Enhanced Risk. ...Great Lakes/Ohio Valley... Although details remain uncertain, isolated to scattered showers/thunderstorms may be ongoing across parts of KY/TN Thursday morning in association with enhanced mid-level westerly flow moving across this area. Still, a moist low-level airmass will destabilize where cloud breaks occur ahead of a southeastward-moving front. Various NAM/RAP forecast soundings across the Great Lakes and Ohio Valley ahead of the front show potential for organized storms given adequate instability and deep-layer shear. The more intense convection will be capable of scattered severe/damaging winds, in addition to the possibility of large hail and a tornado with any supercells. Overall thunderstorm coverage will probably be greatest over the OH Valley in association with the eastward-moving upper trough, with weaker low-level convergence potentially limiting coverage over mid the MS Valley into the Ozarks. Have expanded the Slight Risk across parts of Lower MI and into northwestern PA and vicinity, where latest guidance shows sufficient destabilization should occur to support surface-based thunderstorms and increased potential for severe hail/damaging winds. ...Carolinas... Strong heating of a moist airmass ahead of a lead disturbance will promote moderate to strong instability by early Thursday afternoon. Modest ascent should aid in the development of scattered storms by mid to late afternoon. Damaging gusts with the more organized multicells should be the primary concern, especially if a belt of stronger 2-4 km flow (30-40+ kt) is realized. This activity will likely weaken by Thursday evening. ..Gleason.. 07/19/2023 Read more

WW 0513 Status Updates
STATUS FOR WATCH 0513 HAS NOT BEEN ISSUED YET Read more

WW 513 SEVERE TSTM AR MS TN 182140Z - 190500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 513 NWS Storm Prediction Center Norman OK 440 PM CDT Tue Jul 18 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Arkansas Northern Mississippi Southwestern Tennessee * Effective this Tuesday afternoon from 440 PM until Midnight CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Another strong-severe thunderstorm complex, this one initially over northeastern AR, is expected to move southeastward near an outflow boundary from the earlier activity. Damaging to severe gusts and isolated large hail are the primary concerns. The severe thunderstorm watch area is approximately along and 75 statute miles east and west of a line from 45 miles west northwest of Jackson TN to Oxford MS. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 511...WW 512... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 32035. ...Edwards Read more

MD 1620 CONCERNING SEVERE POTENTIAL...WATCH LIKELY FOR FAR WESTERN TENNESSEE...NORTHEAST ARKANAS...AND NORTHERN MISSISSIPPI
Mesoscale Discussion 1620 NWS Storm Prediction Center Norman OK 0429 PM CDT Tue Jul 18 2023 Areas affected...far western Tennessee...northeast Arkanas...and northern Mississippi Concerning...Severe potential...Watch likely Valid 182129Z - 190000Z Probability of Watch Issuance...80 percent SUMMARY...At least isolated damaging gusts or marginal hail will remain possible for a few more hours, and a new watch is likely. DISCUSSION...Radar shows a decelerating outflow boundary extending from extreme northeast AR to just northeast of the Memphis TN area. Recent trends indicate strengthening storms on the southern fringe/outflow of the southeast MO MCS, with impressive echo IR presentation. Surface analysis confirms a very moist and unstable air mass remains in place south of the AR activity and west of the TN outflow, with dewpoints approaching 80 F in spots. Given the uncapped air mass and robust convection now ongoing over northeast AR, a new watch will likely be issued downstream extending into parts of western TN and northern MS. ..Jewell/Edwards.. 07/18/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MEG...LZK... LAT...LON 35999133 35959060 35938999 35878980 35768951 35438910 35178843 34798820 34428837 34228879 34328973 34579039 35029085 35589130 35999133 Read more

MD 1619 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR SOUTHERN OHIO...EASTERN KENTUCKY...NORTHERN WEST VIRGINIA
Mesoscale Discussion 1619 NWS Storm Prediction Center Norman OK 0347 PM CDT Tue Jul 18 2023 Areas affected...Southern Ohio...Eastern Kentucky...Northern West Virginia Concerning...Severe potential...Watch unlikely Valid 182047Z - 182245Z Probability of Watch Issuance...20 percent SUMMARY...Scattered strong thunderstorms will continue through the afternoon. Present indications are that severe threat may remain relatively disorganized and may not require a WW. DISCUSSION...Radar/satellite imagery shows scattered thunderstorms slowly intensifying over portions of southern Ohio and eastern Kentucky. This development is occurring in a region of a warm/humid air mass with dewpoints in the upper 60s and MLCAPE values currently ranging from 2500-3000 J/kg. Moderately strong winds aloft are also present in this region, with sufficient effective shear for organized multicell or transient supercell structures. Despite the rather favorable environment, storms in eastern KY have been slow to become intense with no ground truth reports of wind damage so far. Given weak forcing, it is unclear whether sufficient coverage of severe activity will warrant a watch. Trends will be closely monitored. ..Hart/Bunting.. 07/18/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...PBZ...RLX...JKL...ILN...LMK... LAT...LON 38248517 39268413 39928173 39658034 38168151 37288376 38248517 Read more

WW 0511 Status Updates
STATUS REPORT ON WW 511 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 SW CKV TO 25 ESE CKV TO 15 SE OWB TO 25 SW EVV. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1618 ..WEINMAN..07/18/23 ATTN...WFO...LMK...PAH...JKL...OHX... STATUS REPORT FOR WS 511 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KYC001-003-009-021-027-029-031-045-053-057-059-061-085-087-091- 093-099-101-123-137-141-147-155-163-169-171-179-183-199-207-213- 217-227-229-231-182140- KY . KENTUCKY COUNTIES INCLUDED ARE ADAIR ALLEN BARREN BOYLE BRECKINRIDGE BULLITT BUTLER CASEY CLINTON CUMBERLAND DAVIESS EDMONSON GRAYSON GREEN HANCOCK HARDIN HART HENDERSON LARUE LINCOLN LOGAN MCCREARY MARION MEADE METCALFE MONROE NELSON OHIO PULASKI RUSSELL SIMPSON TAYLOR WARREN WASHINGTON WAYNE TNC003-015-021-027-031-035-037-041-043-049-055-061-081-085-087- 099-101-111-117-119-133-135-137-141-147-149-159-165-169-175-177- Read more

WW 511 SEVERE TSTM KY TN 181810Z - 190100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 511 NWS Storm Prediction Center Norman OK 110 PM CDT Tue Jul 18 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western and central Kentucky Western and middle Tennessee * Effective this Tuesday afternoon and evening from 110 PM until 800 PM CDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...A line of severe thunderstorms will move rapidly across the watch area this afternoon with the potential for damaging wind gusts to 75 mph. A tornado or two is also possible, in addition to isolated reports of large hail. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 55 miles north northeast of Crossville TN to 10 miles west northwest of Fort Campbell KY. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 510... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 28045. ...Bunting Read more

WW 0512 Status Updates
STATUS FOR WATCH 0512 HAS NOT BEEN ISSUED YET Read more